Alert archive / Montana / Tornado Warnings in 2002

Tornado Warning 9, NWS Glasgow, MT

August 6, 2002Prairie County, Montana

NWS Glasgow, MT issued this tornado warning at Aug 6, 2002, 8:03 PM MDT for Prairie County, Montana. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 6, 2002, 8:03 PM MDT (02:03 UTC)
Expired
Aug 6, 2002, 9:00 PM MDT
In force
57 min
Issued by
NWS Glasgow, MT
Area
Counties, with a storm outline in the text

County Prairie County, MT

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 2.1 hours before the alert went out and 152 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Glasgow Intl Airport, MT at 00:00Z on 2002-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2005 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Glasgow Intl Airport, MT at 00:00Z on 2002-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2005 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
1499 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
77 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

228 
WFUS55 KGGW 070203
TORGGW
MTC079-070300-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GLASGOW MT
801 PM MDT TUE AUG 6 2002

THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN PRAIRIE COUNTY IN NORTHEAST MONTANA

* UNTIL 900 PM MDT

* AT 755 PM MDT...THE PUBLIC REPORTED A THUNDERSTORM PRODUCING A     
  FUNNEL CLOUD 35 MILES NORTHWEST OF TERRY...MOVING NORTHEAST AT 20  
  MPH.

* THE TORNADO PRODUCING STORM WILL REMAIN OVER...
  RURAL WESTERN PRAIRIE COUNTY

THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 
MPH.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED 
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 4690 10609 4678 10541 4717 10534 4707 10607

.END
77

The office that day

Everything else NWS Glasgow, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 6, 6:44 PM MDTTornado WarningGGWPetroleum, Phillips61 min
Aug 6, 8:09 PM MDTSevere Thunderstorm WarningGGWGarfield66 min
Aug 6, 8:38 PM MDTTornado WarningGGWMcCone67 min
Aug 6, 9:46 PM MDTSevere Thunderstorm WarningGGWMcCone, Richland, Roosevelt59 min
Aug 6, 10:00 PM MDTSevere Thunderstorm WarningGGWPhillips60 min
Aug 6, 10:04 PM MDTSevere Thunderstorm WarningGGWMcCone, Richland, Roosevelt41 min
Aug 6, 10:38 PM MDTSevere Thunderstorm WarningGGWValley67 min
Aug 6, 11:44 PM MDTSevere Thunderstorm WarningGGWValley61 min
Aug 6, 11:51 PM MDTSevere Thunderstorm WarningGGWGarfield54 min
Aug 6, 11:54 PM MDTSevere Thunderstorm WarningGGWWibaux66 min
Aug 7, 12:49 AM MDTSevere Thunderstorm WarningGGWValley56 min
Aug 7, 12:53 AM MDTSevere Thunderstorm WarningGGWGarfield, McCone67 min
Aug 7, 1:42 AM MDTFlash Flood WarningGGWPhillips6 hr
Aug 7, 1:55 AM MDTSevere Thunderstorm WarningGGWRoosevelt50 min
Aug 7, 2:21 AM MDTFlash Flood WarningGGWRoosevelt6 hr
Aug 7, 2:47 AM MDTSevere Thunderstorm WarningGGWRoosevelt58 min
Aug 7, 3:17 AM MDTSevere Thunderstorm WarningGGWDaniels, Sheridan58 min

Nearby

Tornado Warnings in Montana, 2002Every tornado warning in 2002Tornadoes in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.